<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    <style>
        /* 响应式图片廊 */
        /* 使用 CSS3 的媒体查询来创建响应式图片廊： */

        div.img {
            border: 1px solid #ccc;
        }

        div.img:hover {
            border: 1px solid #777;
        }

        div.img img {
            width: 100%;
            height: auto;
        }

        div.desc {
            padding: 15px;
            text-align: center;
        }

        * {
            box-sizing: border-box;
        }

        .responsive {
            padding: 0 6px;
            float: left;
            width: 24.99999%;
        }

        @media only screen and (max-width: 700px) {
            .responsive {
                width: 49.99999%;
                margin: 6px 0;
            }
        }

        @media only screen and (max-width: 500px) {
            .responsive {
                width: 100%;
            }
        }

        .clearfix:after {
            content: "";
            display: table;
            clear: both;
        }
    </style>
</head>

<body>

    <h2 style="text-align:center">响应式图片相册</h2>

    <div class="responsive">
        <div class="img">
            <a target="_blank" href="img_fjords.jpg">
                <img src="http://www.runoob.com/wp-content/uploads/2016/04/img_fjords.jpg" alt="Trolltunga Norway"
                    width="300" height="200">
            </a>
            <div class="desc">Add a description of the image here</div>
        </div>
    </div>


    <div class="responsive">
        <div class="img">
            <a target="_blank" href="img_forest.jpg">
                <img src="http://www.runoob.com/wp-content/uploads/2016/04/img_forest.jpg" alt="Forest" width="600"
                    height="400">
            </a>
            <div class="desc">Add a description of the image here</div>
        </div>
    </div>

    <div class="responsive">
        <div class="img">
            <a target="_blank" href="img_lights.jpg">
                <img src="http://www.runoob.com/wp-content/uploads/2016/04/img_lights.jpg" alt="Northern Lights"
                    width="600" height="400">
            </a>
            <div class="desc">Add a description of the image here</div>
        </div>
    </div>

    <div class="responsive">
        <div class="img">
            <a target="_blank" href="img_mountains.jpg">
                <img src="http://www.runoob.com/wp-content/uploads/2016/04/img_mountains.jpg" alt="Mountains"
                    width="600" height="400">
            </a>
            <div class="desc">Add a description of the image here</div>
        </div>
    </div>

    <div class="clearfix"></div>

    <div style="padding:6px;">

        <h4>重置浏览器大小查看效果</h4>
    </div>

</body>

</html>